Establishing The Connection To The I/O - Siemens SIMATIC S5 Manual

Installation Guidelines
2.3

Establishing the Connection to the I/O

The following electrical connection must be made depending on your application:
• Connection between 24 V digital inputs of the module and plant sensors
• Connection between 24 V digital outputs of the module and plant actuators
• Connection between differential inputs of the module and sensors with differential signals
• 24 V power supply
Connecting 24 V digital inputs
The digital inputs of the IP 265 are designed for 24 V DC. The signal lines of the sensors are to be
shielded and connected via the 9-pin sub D connector of the IP 265 marked "Input".
Connecting 24 V digital outputs
The digital outputs of the IP 265 are designed for 24 V DC. The signal lines of the digital actuators
are to be shielded and connected via the 9-pin sub D socket marked "Output".
Connecting differential inputs
The signal lines of the sensors with 5 V differential signals are connected via the 15-pin sub D soc-
ket of the IP 265 marked "Interface". Signal lines of up to 32 m are possible. The signal lines must
be shielded Pre-fabricated standard cables can be ordered (see Appendix C). If pre-fabricated cable
is not used and if a sensor with 5 V differential signals is to be connected to the IP 265, the 5 V sen-
sor line must also be shielded.
Example: A pulse sensor is to be connected to the IP 265.
Connection of counting pulse sensor for 5 V RS 422
differential signal
External supply
5 V
0 V
Pulse sensor
5 V
V
a
Shield
Figure 2-2 Connection Example for 24 V Digital Input
2-2
IP 265 ground (central
ground)
I
N
1
11
T
6
2
12
E
7
3 13
R
8
4
14
F
9
5
15
A
10
C
E
Standard Function Counter
Connection of counter pulse sensor for 24 V DC
External supply
24 V 0 V
IP 265 ground (central
Pulse sensor
24 V
Shield
ground)
I
N
1
6
2
P
7
3
8
U
4
9
5 T
EWA 4NEB 812 6131-02